[AMD Official Use Only - General]
Thanks for catching this.
Reviewed-by: Evan Quan <evan.q...@amd.com>
> -----Original Message-----
> From: Dan Carpenter <dan.carpen...@linaro.org>
> Sent: Tuesday, June 6, 2023 4:34 PM
> To: Quan, Evan <evan.q...@amd.com>
> Cc: Deucher, Alexander <alexander.deuc...@amd.com>; Koenig, Christian
> <christian.koe...@amd.com>; Pan, Xinhui <xinhui....@amd.com>; David
> Airlie <airl...@gmail.com>; Daniel Vetter <dan...@ffwll.ch>; Lazar, Lijo
> <lijo.la...@amd.com>; Zhang, Hawking <hawking.zh...@amd.com>; Feng,
> Kenneth <kenneth.f...@amd.com>; Li, Candice <candice...@amd.com>;
> Chai, Thomas <yipeng.c...@amd.com>; Wang, Yang(Kevin)
> <kevinyang.w...@amd.com>; Zhang, Horatio <hongkun.zh...@amd.com>;
> amd-gfx@lists.freedesktop.org; kernel-janit...@vger.kernel.org
> Subject: [PATCH] drm/amd/pm: Fix memory some memory corruption
>
> The "od_table" is a pointer to a large struct, but this code is doing pointer
> math as if it were pointing to bytes. It results in writing far outside the
> struct.
>
> Fixes: f0a0c659fb96 ("drm/amd/pm: fulfill the OD support for SMU13.0.0")
> Fixes: e3afa4f988b3 ("drm/amd/pm: fulfill the OD support for SMU13.0.7")
> Signed-off-by: Dan Carpenter <dan.carpen...@linaro.org>
> ---
> drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c | 4 ++--
> drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c | 4 ++--
> 2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
> b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
> index 5ac5ea770c1c..413e592f0ed6 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
> @@ -1535,7 +1535,7 @@ static int smu_v13_0_0_od_edit_dpm_table(struct
> smu_context *smu,
> * settings. Thus we do not cache it.
> */
> offset_of_featurectrlmask = offsetof(OverDriveTable_t,
> FeatureCtrlMask);
> - if (memcmp(od_table + offset_of_featurectrlmask,
> + if (memcmp((u8 *)od_table + offset_of_featurectrlmask,
> table_context->user_overdrive_table +
> offset_of_featurectrlmask,
> sizeof(OverDriveTableExternal_t) -
> offset_of_featurectrlmask)) {
> smu_v13_0_0_dump_od_table(smu, od_table); @@ -
> 1548,7 +1548,7 @@ static int smu_v13_0_0_od_edit_dpm_table(struct
> smu_context *smu,
>
> od_table->OverDriveTable.FeatureCtrlMask = 0;
> memcpy(table_context->user_overdrive_table +
> offset_of_featurectrlmask,
> - od_table + offset_of_featurectrlmask,
> + (u8 *)od_table + offset_of_featurectrlmask,
> sizeof(OverDriveTableExternal_t) -
> offset_of_featurectrlmask);
>
> if (!memcmp(table_context->user_overdrive_table,
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
> b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
> index 0bd086360efa..cda4e818aab7 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
> @@ -1524,7 +1524,7 @@ static int smu_v13_0_7_od_edit_dpm_table(struct
> smu_context *smu,
> * settings. Thus we do not cache it.
> */
> offset_of_featurectrlmask = offsetof(OverDriveTable_t,
> FeatureCtrlMask);
> - if (memcmp(od_table + offset_of_featurectrlmask,
> + if (memcmp((u8 *)od_table + offset_of_featurectrlmask,
> table_context->user_overdrive_table +
> offset_of_featurectrlmask,
> sizeof(OverDriveTableExternal_t) -
> offset_of_featurectrlmask)) {
> smu_v13_0_7_dump_od_table(smu, od_table); @@ -
> 1537,7 +1537,7 @@ static int smu_v13_0_7_od_edit_dpm_table(struct
> smu_context *smu,
>
> od_table->OverDriveTable.FeatureCtrlMask = 0;
> memcpy(table_context->user_overdrive_table +
> offset_of_featurectrlmask,
> - od_table + offset_of_featurectrlmask,
> + (u8 *)od_table + offset_of_featurectrlmask,
> sizeof(OverDriveTableExternal_t) -
> offset_of_featurectrlmask);
>
> if (!memcmp(table_context->user_overdrive_table,
> --
> 2.39.2
